Additional information on the
Wireless Set 1154 Transmitter Kindly
supplied by Bob Fairman.The Lancaster was not the only
aircraft in which this equipment was installed.
They were used extensively
in aircraft of all types in the RAF during and after WW2.
I used them
during the whole of my time in the RAF from 1949 to 1957 and they
continued in use for some years after that.
During that time rumour had it
that in a storage depot 'somewhere in England' there was a warehouse
stacked to the rafters with unused replacement sets, which explained why
they had not been superseded by radios of greater power which would have
been a boon to us ops on long range Transport Command.

Transmitters of the T.1154 series were designed primarily for installation in aircraft, to provide air-to-ground or air-to-air communication by
W/T, and in all but two versions by .R /T as well. Series L, however, was intended for installation in
high-speed launches, and series D and E were introduced for mobile ground stations. Normally all these transmitters
were used with receivers of the R.1155 series.

Frequency coverage
Altogether there were thirteen production varieties of the T. 1154, the principal differences between them concerning frequency coverage and the provision or absence of R/T facilities. Component variations in the drive and output units, modifications of the “click-stop” mechanism for rapid selection of pre-set frequencies, and the use of steel or aluminium cases account for further versions. Table 1 enumerates the different types of transmitter and their frequency ranges. The colours stated in the table are those of the tuning controls for the ranges concerned.

*Note._Transrnitters marked with an asterisk provide C.W. and M.C.W. only. All others are for C.W., M.C.W., and RT.

In all transmitters with three frequency ranges there are separate sets of tuning controls for each range, identified by colours as in the foregoing table. Series C, F, H, K, and M, however, use the same set of controls, coloured blue, for the two higher
H.F. ranges.

Pre-set frequency selection
The click-stop mechanism is arranged so that the tuning controls click into and are rigidly held in the correct position for pre-set frequencies.
With the Multi-click system all the chosen frequencies are selected in turn as the tuning dials are rotated, and the operator sees which one is engaged at any moment by means of lettered tabs coming into view behind an aperture.
The mechanism can be released to allow free rotation of the dials when setting up frequencies which have not been pre-selected.

The Uni-click mechanism on the other hand allows one click-stop to be brought into use at a time, the stop required being selected by turning a selector knob to the appropriate position on a lettered dial.

Pictured at right are various views
of my 1154 some showing the internal wiring.

Clicking on the images will
produce a larger view, please use your browser back button to return to
this page.

We do all we can to provide
the very best that is available for you.
But in the unlikely event that any data should not be as you expected.
A refund is always available. Kind Regards Allen and Alanna.

Manuals are Available
Worldwide as
Paper Copy on CD or as a Download
Thank you for your interest. Allen
and Alanna G0RIT
Should you wish to purchaseFor Worldwide Prices Payment Options and Delivery
Details Manual Only

We do all we can to provide
the very best that is available for you.
But in the unlikely event that any data should not be as you expected.
A refund is always available. Kind Regards Allen and Alanna.

Manuals are Available
Worldwide as
Paper Copy on CD or as a Download
Thank you for your interest. Allen
and Alanna G0RIT
Should you wish to purchaseFor Worldwide Prices Payment Options and Delivery
Details Manual Only